Know Your Environment. Protect Your Health.

Nitrate

Dripping Springs Water Supply Corporation

Nitrate, a fertilizer chemical, frequently contaminates drinking water due to agricultural and urban runoff, and discharges from municipal wastewater treatment plants and septic tanks. Excessive nitrate in water can cause oxygen deprivation in infants and increase the risk of cancer. Click here to read more about nitrate.

 

12

Samples

0

Samples exceeding legal limit (MCL)

6

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20180.115 ppm220.0500 ppm - 0.180 ppm
20190.330 ppm21ND - 0.660 ppm
20200.125 ppm21ND - 0.250 ppm
20210.0850 ppm21ND - 0.170 ppm
20220.0750 ppm21ND - 0.150 ppm
20230.0800 ppm21ND - 0.160 ppm

ppm = parts per million

State, National, and Health Guidelines for Drinking Water

EWG Health Guideline: 0.14 ppm

The EWG health guideline of 0.14 parts per million, or ppm, for nitrate and nitrite is based on the equivalent health guideline for nitrate, as defined in a peer-reviewed scientific study by EWG. This guideline represents a one-in-one-million annual cancer risk level.

EPA Maximum Contaminant
Level (MCL): 10 ppm

The legal limit for nitrate, established in 1962, was developed to protect infants from acute methemoglobinemia, a life-threatening disorder of oxygen transport in the body. This limit does not fully protect against the risk of cancer and harm to the developing fetus.

ppm = parts per million

All test results

Date Lab ID Result
2018-01-31AE114150.0500 ppm
2018-05-02AE247100.180 ppm
2019-02-11AE536540.660 ppm
2019-02-11AE53672ND
2020-03-11AF021130.250 ppm
2020-03-11AF02152ND
2021-02-11AF43591ND
2021-02-11AF435920.170 ppm
2022-06-07AF99764ND
2022-06-07AF997670.150 ppm
2023-03-06AG314790.160 ppm
2023-06-22AG45491ND